A handful of engineering problems I've owned end-to-end — infrastructure that was costing more than it earned, performance cliffs hiding under product features, and systems that needed to move faster than a release cycle.
Re-architected report data synchronization across the platform — moved a 24-hour scheduled pull onto AWS Lambda with delta sync, dropped sync time to 15 minutes, and cut load on the company's shared core service by 70%.
Closed a production performance incident by replacing an ORM-driven client-side scan with a server-side filtered index — collapsing a 20-second cloning operation to 200 ms and removing an entire class of customer support tickets.
Built a high-performance map clustering service for a UK property investment platform, rendering a country-wide dataset at any zoom level in under 100 ms.
Designed a metaprogramming engine that compiled UI-defined rules into executable C# at runtime — collapsing the time-to-market for new pricing rules by 90% and removing the need for code releases.